US3245784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithographic master and process of preparation
Assignee: 3M Co
•
Filing: 1961-10-16
•
Granted: 1966-04-12
•
Expires: 1981-10-16
Abstract
No abstract record available.
Inventors
- 👤 Stricklin Buck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:56
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/26; G03G13/28; G03G17/00; G03G17/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
64 words
A PROCESS FOR THE PREPARATION OF A DIRECT-IMAGE PHOTO LITHOGRAPHIC MASTER WHICH COMPRISES SELECTIVELY EXPOSING THE SURFACE OF A DIRECT IMAGE PHOTO LITHOGRAPHIC PRINTING PLATE COMPRISING A PHOTOCONDUCTIVE SHEET MATERIAL UNIFORMLY TOP-COATED WITH A TRANSPARENT WATER INSOLUBLE HYDROPHILIC LAYER TO A LIGHT IMAGE SO AS TO RENDER THE EXPOSED AREA PHOTOCONDUCTIVE AND DEPOSITING AN OLEOPHILIC IMAGE ON THE PHOTOCONDUCTIVE AREAS OF THE LITHOGRAPHIC PLATE.
Claim 2
Dependent Claim
64 words
A PROCESS FOR THE PREPARATION OF A DIRECT-IMAGE PHOTO LITHOGRAPHIC MASTER WHICH COMPRISES SELECTIVELY EXPOSING THE SURFACE OF A DIRECT IMAGE PHOTO LITHOGRAPHIC PRINTING PLATE COMPRISING A PHOTOCONDUCTIVE SHEET MATERIAL UNIFORMLY TOP-COATED WITH A TRANSPARENT WATER INSOLUBLE HYDROPHILIC LAYER TO A LIGHT IMAGE SO AS TO RENDER THE EXPOSED AREA PHOTOCONDUCTIVE AND DEPOSITING AN OLEOPHILIC IMAGE ON THE PHOTOCONDUCTIVE AREAS OF THE LITHOGRAPHIC PLATE.
Claim 3
Dependent Claim
44 words
A DIRECT-IMAGE PHOTO LITHOGRAPHIC PRINTING MASTER COMPRISING A PHOTOCONDUCTIVE SHEET MATERIAL UNIFORMLY AND CONTINUOUSLY TOP-COATED WITH A TRANSPARENT WATER INSOLUBLE, WATER PERMEABLE HYDROPHILIC LAYER AND SUPERIMPOSED ON SAID HYDROPHILIC LAYER, AN OLEOPHILIC IMAGE SELECTIVELY DEPOSITED ON THE LIGHT-EXPOSED PORTIONS OF SAID PHOTOCONDUCTIVE SHEET MATERIAL.
Claim 4
Dependent Claim
44 words
A DIRECT-IMAGE PHOTO LITHOGRAPHIC PRINTING MASTER COMPRISING A PHOTOCONDUCTIVE SHEET MATERIAL UNIFORMLY AND CONTINUOUSLY TOP-COATED WITH A TRANSPARENT WATER INSOLUBLE, WATER PERMEABLE HYDROPHILIC LAYER AND SUPERIMPOSED ON SAID HYDROPHILIC LAYER, AN OLEOPHILIC IMAGE SELECTIVELY DEPOSITED ON THE LIGHT-EXPOSED PORTIONS OF SAID PHOTOCONDUCTIVE SHEET MATERIAL.
References Cited (Backward Citations)
US2886434A
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US2860048A
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US2997387A
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US2952536A
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US3107169A
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US3053179A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |